LEDs

LED	Color	Display	State	Meaning
RUN	green	off	Init	State of the EtherCAT State Machine: INIT = Initialization of the terminal or BOOTSTRAP = Function for firmware updates of the terminal
		blinking	Pre- Operational	State of the EtherCAT State Machine: PREOP = Setting for mailbox communication and variant standard settings
		single flash	Safe- Operational	State of the EtherCAT State Machine: SAFEOP = Channel checking of the Sync Manager and the Distributed Clocks. Outputs stay in safe operation mode.
		on	Operational	State of the EtherCAT State Machine: OP = Normal operation mode, mailbox- and process data communication possible
		flickering	Bootstrap	State of the EtherCAT State Machine: BOOTSTRAP = function for firmware updates of the plug-in module
Out U OK	green	ON	-	Supply voltages are OK, there are no errors
Out U OK	green	OFF	-	Supply voltage is incorrect, i.e. too high or too low Overtemperature in the temperature simulation Temperature at the module too high
Chop. ON	Yellow	ON	-	The external resistor is switched on.
Over U	Yellow	ON	-	The supply voltage has exceeded the threshold value for overvoltage.
Under U	Yellow	ON	-	The supply voltage is too low, or has fallen below the corresponding threshold value in the CoE data.
T. Warn.	Yellow	ON	-	Temperature threshold value for the temperature on the PCB has been exceeded.
T. R. Warn.	Yellow	ON	-	The I2T warning level threshold value has been exceeded.
Error	red	ON + Undervoltage LED	-	The supply voltage is not connected or is so low that the supply voltage and ResistorCurrent values cannot be read.
Error	red	ON + LED T.R. Warn. + LED Over U	-	There is an overtemperature in the temperature simulation for the external resistor.